Unify Windows shared source for BlazorWebView (dotnet#4159)

* Change WPF/WinForms/MAUI to use shared source instead of old 'WebView2' package, which is now removed
* Remove interfaces/wrappers from WinForms/WPF/MAUI

Microsoft.Maui-mac.slnf

@@ -5,7 +5,6 @@
       "src\\BlazorWebView\\samples\\MauiRazorClassLibrarySample\\MauiRazorClassLibrarySample.csproj",
       "src\\BlazorWebView\\samples\\WebViewAppShared\\WebViewAppShared.csproj",
       "src\\BlazorWebView\\src\\Maui\\Microsoft.AspNetCore.Components.WebView.Maui.csproj",
-      "src\\BlazorWebView\\src\\WebView2\\Microsoft.AspNetCore.Components.WebView.WebView2.csproj",
       "src\\BlazorWebView\\tests\\MauiDeviceTests\\MauiBlazorWebView.DeviceTests.csproj",
       "src\\Compatibility\\Android.AppLinks\\src\\Compatibility.Android.AppLinks.csproj",
       "src\\Compatibility\\Android.FormsViewGroup\\src\\Compatibility.Android.FormsViewGroup-net6.csproj",

Microsoft.Maui-net6.sln

@@ -70,8 +70,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Resizetizer.UnitTests-net6"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "samples", "samples", "{A8E9400E-70DD-421F-8609-1C2FA4AE8E71}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.Components.WebView.WebView2", "src\BlazorWebView\src\WebView2\Microsoft.AspNetCore.Components.WebView.WebView2.csproj", "{5256004D-AA93-4C44-A59E-026E12756BD1}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WebViewAppShared", "src\BlazorWebView\samples\WebViewAppShared\WebViewAppShared.csproj", "{9F1E0CE0-BF56-433F-8238-6C2B880EEF18}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Workload", "Workload", "{EC63FD88-5E12-46D7-B440-68F70241D987}"
@@ -198,6 +196,12 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{A9C514B9
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MauiBlazorWebView.DeviceTests", "src\BlazorWebView\tests\MauiDeviceTests\MauiBlazorWebView.DeviceTests.csproj", "{5FEA7500-0ACE-4C26-9A7B-2EB3958CBBC6}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "SharedSource", "SharedSource", "{4F2926C8-43AB-4328-A735-D9EAD699F81D}"
+	ProjectSection(SolutionItems) = preProject
+		src\BlazorWebView\src\SharedSource\QueryStringHelper.cs = src\BlazorWebView\src\SharedSource\QueryStringHelper.cs
+		src\BlazorWebView\src\SharedSource\WebView2WebViewManager.cs = src\BlazorWebView\src\SharedSource\WebView2WebViewManager.cs
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SharedMSBuildProjectFiles) = preSolution
 		src\Compatibility\ControlGallery\src\Issues.Shared\Compatibility.ControlGallery.Issues.Shared.projitems*{0a39a74b-6f7a-4d41-84f2-b0ccdce899df}*SharedItemsImports = 5
@@ -293,10 +297,6 @@ Global
 		{05DB57B8-D0A5-499B-AD35-7093C2E9C9D7}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{05DB57B8-D0A5-499B-AD35-7093C2E9C9D7}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{05DB57B8-D0A5-499B-AD35-7093C2E9C9D7}.Release|Any CPU.Build.0 = Release|Any CPU
-		{5256004D-AA93-4C44-A59E-026E12756BD1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{5256004D-AA93-4C44-A59E-026E12756BD1}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{5256004D-AA93-4C44-A59E-026E12756BD1}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{5256004D-AA93-4C44-A59E-026E12756BD1}.Release|Any CPU.Build.0 = Release|Any CPU
 		{9F1E0CE0-BF56-433F-8238-6C2B880EEF18}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{9F1E0CE0-BF56-433F-8238-6C2B880EEF18}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9F1E0CE0-BF56-433F-8238-6C2B880EEF18}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -532,7 +532,6 @@ Global
 		{E25E7929-2423-4C8A-9B03-DC4C8B19A2E5} = {D5478E0A-5D9C-4C1F-980C-7A9FC71F925E}
 		{05DB57B8-D0A5-499B-AD35-7093C2E9C9D7} = {E25E7929-2423-4C8A-9B03-DC4C8B19A2E5}
 		{A8E9400E-70DD-421F-8609-1C2FA4AE8E71} = {1614D1A4-5C3D-4D5B-8C89-426E37A564EF}
-		{5256004D-AA93-4C44-A59E-026E12756BD1} = {ED7F28E0-D0AF-417D-983D-3D874EEE8554}
 		{9F1E0CE0-BF56-433F-8238-6C2B880EEF18} = {A8E9400E-70DD-421F-8609-1C2FA4AE8E71}
 		{91B7E807-1026-4238-A7C2-D7A02C66F141} = {EC63FD88-5E12-46D7-B440-68F70241D987}
 		{9D8171BD-0F66-4D97-9A38-46800FC6B710} = {EC63FD88-5E12-46D7-B440-68F70241D987}
@@ -595,6 +594,7 @@ Global
 		{532ACF23-381B-4F54-AEA9-25B5485F9148} = {E1082E26-D700-4127-9329-66D673FD2D55}
 		{A9C514B9-1EE2-4A12-8E8A-CE16D87545C3} = {1614D1A4-5C3D-4D5B-8C89-426E37A564EF}
 		{5FEA7500-0ACE-4C26-9A7B-2EB3958CBBC6} = {A9C514B9-1EE2-4A12-8E8A-CE16D87545C3}
+		{4F2926C8-43AB-4328-A735-D9EAD699F81D} = {ED7F28E0-D0AF-417D-983D-3D874EEE8554}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {0B8ABEAD-D2B5-4370-A187-62B5ABE4EE50}

Microsoft.Maui.Packages-mac.slnf

@@ -3,7 +3,6 @@
     "path": "Microsoft.Maui-net6.sln",
     "projects": [
       "src\\BlazorWebView\\src\\Maui\\Microsoft.AspNetCore.Components.WebView.Maui.csproj",
-      "src\\BlazorWebView\\src\\WebView2\\Microsoft.AspNetCore.Components.WebView.WebView2.csproj",
       "src\\Compatibility\\Android.FormsViewGroup\\src\\Compatibility.Android.FormsViewGroup-net6.csproj",
       "src\\Compatibility\\Core\\src\\Compatibility-net6.csproj",
       "src\\Controls\\Maps\\src\\Controls.Maps-net6.csproj",

Microsoft.Maui.Packages-net6.slnf

@@ -3,7 +3,6 @@
     "path": "Microsoft.Maui-net6.sln",
     "projects": [
       "src\\BlazorWebView\\src\\Maui\\Microsoft.AspNetCore.Components.WebView.Maui.csproj",
-      "src\\BlazorWebView\\src\\WebView2\\Microsoft.AspNetCore.Components.WebView.WebView2.csproj",
       "src\\BlazorWebView\\src\\WindowsForms\\Microsoft.AspNetCore.Components.WebView.WindowsForms.csproj",
       "src\\BlazorWebView\\src\\Wpf\\Microsoft.AspNetCore.Components.WebView.Wpf.csproj",
       "src\\Compatibility\\Android.FormsViewGroup\\src\\Compatibility.Android.FormsViewGroup-net6.csproj",

src/BlazorWebView/src/Maui/Microsoft.AspNetCore.Components.WebView.Maui.csproj

@@ -4,6 +4,7 @@
     <TargetFrameworks>net6.0;$(MauiPlatforms)</TargetFrameworks>
     <Nullable>enable</Nullable>
     <Description>Build .NET MAUI applications with Blazor web UI in the BlazorWebView control.</Description>
+    <DefineConstants>$(DefineConstants);WEBVIEW2_MAUI</DefineConstants>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\.nuspec\Microsoft.Maui.Controls.MultiTargeting.targets" />
@@ -14,8 +15,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Compile Include="..\SharedSource\QueryStringHelper.cs" Link="QueryStringHelper.cs" />
-    <Compile Include="..\WebView2\Internal\StaticContentProvider.cs" Link="Windows\SharedSource\StaticContentProvider.cs" />
+    <Compile Include="..\SharedSource\**\*.cs" Link="Windows\SharedSource\%(Filename)%(Extension)"/>
   </ItemGroup>
 
   <ItemGroup>

src/BlazorWebView/src/Maui/Windows/BlazorWebViewHandler.Windows.cs

@@ -61,7 +61,7 @@ private void StartWebViewCoreIfPossible()
 			// the precedence of which files are loaded from where.
 			var customFileProvider = VirtualView.CreateFileProvider(contentRootDir) ?? new NullFileProvider();
 
-			_webviewManager = new WinUIWebViewManager(NativeView, new WinUIWebView2Wrapper(NativeView), Services!, ComponentsDispatcher, customFileProvider, VirtualView.JSComponents, hostPageRelativePath, contentRootDir);
+			_webviewManager = new WinUIWebViewManager(NativeView, Services!, ComponentsDispatcher, customFileProvider, VirtualView.JSComponents, hostPageRelativePath, contentRootDir);
 
 			if (RootComponents != null)
 			{